BREW-JUPYTERLAB-CVE-2021-32798 (GHSA-HWVQ-6GJX-J797)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:01 – Updated: 2026-09-16 09:20 – Source website
VLAI
Summary
Special Element Injection in notebook
Details

Impact

Untrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook.

Patches

5.7.11, 6.4.1

References

OWASP Page on Injection Prevention

For more information

If you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list security@ipython.org.

Credit: Guillaume Jeanne from Google

Example:

A notebook with the following content in a cell and it would display an alert when opened for the first time in Notebook (in an untrusted state):

{ "cell_type": "code", "execution_count": 0, "metadata": {}, "outputs": [ { "data": { "text/html": [ "<select><iframe></select><img src=x: onerror=alert('xss')>\n"], "text/plain": [] }, "metadata": {}, "output_type": "display_data" } ], "source": [ "" ] }

Severity
10.0 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
7.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "notebook",
        "resource_purl": "pkg:pypi/notebook@7.6.2",
        "upstream_fixed_in": "6.4.1"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "jupyterlab",
        "purl": "pkg:brew/jupyterlab"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.6.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/notebook@7.6.2",
        "name": "notebook",
        "resource": "notebook",
        "strategy": "registry",
        "subject_version": "7.6.2"
      }
    ]
  },
  "details": "### Impact\n\nUntrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook.\n\n### Patches\n\n5.7.11, 6.4.1\n\n### References\n\n[OWASP Page on Injection Prevention](https://cheatsheetseries.owasp.org/cheatsheets/Injection_Prevention_Cheat_Sheet.html#injection-prevention-rules)\n\n### For more information\n\nIf you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list security@ipython.org.\n\nCredit: Guillaume Jeanne from Google\n\n\n### Example:\n\nA notebook with the following content in a cell and it would display an alert when opened for the first time in Notebook (in an untrusted state):\n\n```\n{ \"cell_type\": \"code\", \"execution_count\": 0, \"metadata\": {}, \"outputs\": [ { \"data\": { \"text/html\": [ \"\u003cselect\u003e\u003ciframe\u003e\u003c/select\u003e\u003cimg src=x: onerror=alert(\u0027xss\u0027)\u003e\\n\"], \"text/plain\": [] }, \"metadata\": {}, \"output_type\": \"display_data\" } ], \"source\": [ \"\" ] }\n````",
  "id": "BREW-jupyterlab-CVE-2021-32798",
  "modified": "2026-09-16T09:20:59Z",
  "published": "2026-08-13T17:01:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jupyter/notebook/security/advisories/GHSA-hwvq-6gjx-j797"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32798"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jupyter/notebook/commit/79fc76e890a8ec42f73a3d009e44ef84c14ef0d5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jupyter/notebook"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/notebook/PYSEC-2021-118.yaml"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Special Element Injection in notebook",
  "upstream": [
    "GHSA-hwvq-6gjx-j797",
    "BIT-jupyter-base-notebook-2021-32798",
    "BIT-jupyter-notebook-2021-32798",
    "CVE-2021-32798",
    "PYSEC-2021-118"
  ]
}



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